The Nag Hammadi library consists of twelve books, plus eight leaves of a thirteenth book. There are a total of fifty-two tracts. These are now kept in the Coptic Museum in Cairo, and, as the name suggests, are written in Coptic, although it is clear that the texts are Coptic translations of earlier Greek works. The discovery of 13 books containing 52 texts in the Nile River valley of Egypt in 1945 called Nag Hammadi opened the door for the history of early Christianism and the teachings of four Gnostic gospels called; the secret book of James, the gospel of Thomas, the book of Thomas and secret book of John.
The Berlin Gnostic Codex, discovered in 1896, was not published until 1955 contains four texts written in Coptic like the texts of the Nag Hammadi library. The texts are the Gospel of Mary, preserved in an incomplete state; the Secret Book of John; the Wisdom of Jesus Christ; and the Act of Peter. Versions of the Secret Book of John and the Wisdom of Jesus Christ are also found in the Nag Hammadi library.
The Codex Sinaiticus or Sinai Bible is a 4th-century Christian manuscript of a Greek Bible, containing the majority of the Greek Old Testament, including the Apocrypha, and the Greek New Testament, with both the Epistle of Barnabas and the Shepherd of Hermas included.
The great uncial codices or four great uncials are the only remaining uncial codices that contain (or originally contained) the entire text of the Bible (Old and New Testament) in Greek. They are the Codex Vaticanus in the Vatican Library, the Codex Sinaiticus and the Codex Alexandrinus in the British Library, and the Codex Ephraemi Rescriptus in the Bibliothèque nationale de France in Paris.
https://bible.usccb.org/bible/philemon/1